Formula reviewed
Number Needed to Treat NNT or NNH Calculator
Control Event Rate CER Experimental Event Rate EER Number Needed to Treat NNT or Number Needed to Harm NNH Explanation and Clinical Context Number Needed to Treat is a measure that reflects how many patients need to receive a specific intervention for one additional patient to benefit compared with control therapy. When the treatment reduces adverse outcomes the absolute risk reduction becomes positive and the result